How to configure a DNS server

Symptom

To create test SIP calls to a Dialogic IMG Integrated Media Gateway using a hostname rather than IP address, a local DNS server is required.

Reason for the issue:

IMG Gateways support SIP calls that use a FQDN (Fully Qualified Domain Name)

Note: The following procedure was tested on a Dialogic Gate Control Element Management System (GCEMS) server running Redhat ES 3.0

IMG Gateways run a DNS client that is configured to send a DNS request to the DNS server for SIP calls.

Configuring a static DNS server on Linux Red Hat ES3: 

1. Decide on a domain name.
         
2. Edit the /etc/resolv.conf file and add the loopback ip as the first entry in this file.

...